Ignition device



A. H. HOADLEY.

IGNLTIGN DEVICE.-

APPumoN msn um zo. 191s.

WA4/f,

mvudofo Azffedwadf ALFRED HXHOAIQLEY, F NEW YORK, N, Y.

GNTEN DEVCE.

Specification of Letters Eateiit.

Patented Apr. 27, 1920. v

Application filed May 20, 1218. Serial No. 235,441.

To all whom t may Concern Be it known that I, ALFRED H. HoinLiaY,

citizen of the United States, residing at New York, in the county of NewYork and State otNew York, have invented new and 'usefullmprovements 'inIgnition Devices, of which the following is a specification.

LThis invention relates to ignition devices Avand has for its' primaryobject the provision of a plurality of'electrodes in which spark gaps ofvarying lengths will be constantly produced therebetween and a.multiplicity.

of sparking pointsv provided whereby 'to enable the device to properly.accommodate itself in substantially an automatic manner j to varyingconditions of an internal conibustion enginel at all times.

Another object of the invention relates to an improvement in electricignition ldevices in which, through an arrangement of the several partsofthe device, the liabilityvof mis-liring is materially reduced and inwhich the electrodes can beA adjusted relatively to vary the distancetherebetween to suit all given or known requirements.

Another object of the invention resides in the provision of an ignitiondevice in which the principal parts thereof will be of stock formation,capable `of being readily assembled-at a minimum cost, while producing adevice of ahighly practical nature, and one which will be positive ofaction.

With the 'above and other objects in view which will appear as thenature of the invention is4 better understood, the same consists in theimproved construction and novel arrangements of parts which willhereinafter be fully described and particularly pointed out in theclaims.

In the accompanying drawings, has been illustrated,a single andpreferred toi-in ci the invention, it being, however, understood that nolimitations are necessarily made to the precise structural .detailstherein exhibited, but that changes, alterations and inodiicationswithin the scope 0i' the claims may be resorted to when desired.

Figure 1 is a side view of my improved ignition device.

Fig. 2 is a vertical section therethrough.

Fig. 3 is a section taken en line' 3--3 oi" Fig. 1.

Fig. i is a section taken en line --t of Fig. 1, looking in thedirection ci the arrows.

Through the bore 7 passes an insulator 10 which may be constructed ofanyv 'suitable well known material. It is providedwith a bore 11 and achamber 12, the latter being` in communication with the bore as shown inFig. 2. The said insulator isprovided with a reduced upper portion 13and` a similar reduced lower portionv 14, which are spaced apart by theintermediate e larged section y15 of said' insulator. 1n this mannershoulders 16 and 17 are formed upon the insulator and associatedtherewith are circular metallic packing rings 18. y A bushing 19 isremovably connected with the upper. reduced portion 13 of the insulatorand as illustrated, the thread 20 of said bushingis received by thethread 9 of the hase 6, whereby it may bebrought. with pressure `againstthe packing gasket 18.

electrode 21 is provided with depending arms 23 which are spaced apartto produce openings 24: at the sides of said electrode. These' arms areconnected together by an integral flat disk 25 which is arranged rightangles to the longitudinal axis of the device.

rThe second electrode is in the form oi" a stem 26 which is received bythe bore 11 of the insulator. It is threaded at its upper end at 27 andat its lower end at 2 8, the former thread being projected above theportion 13 of the insulator where it is connected with a set nut 29 anda mating jam nut 30 whereby when once a desired adjustment of theelectrode has been obtained, it may be iXedly maintained in suchposition. In addition thereto, the said jam nut and the set nut arearranged for connection in an elementl is 'a spring j37 which bearsagainst ordinary electric circuit as will be understood. This Aelectrodeextends through the chamber 12 and within the chamber it is providedwith an integral collar 31 and an asbestos washer 31 which is adapted tocontact with a shoulder 32 at the upper end of vthe-mentioned chamber 12.to establish a seated connection. A

Thel thread 2S of the electrode 26 is re'- ceived in the l'socket 33 ofa` sparkling element 34, the same having a head 35 of circular'formationv which is eonvexed and larranged to `oppose the flat face ofthe 'disk 25 of the mating electrode 21. i In this manner it will beevident that a multiplicity of sparking points is provided, while at the'substantially elastic manner to varying con- I ditions of internalcombustion engines. The two electrodes may be adjusted with 'respectto'eaoh other in order that the gap'there-- between can befvaried at thewill of the operator. The sparking elementy 34: can be adjusted on thethread 28 to suit var ing conditions. In the Asocket, of the spar g thelower end of the stern 26 t0 hold said element in its adjusted position.

lVhat is claimed as new is 1. A spark plug comprising a base, aninsulator extending through said base, an electrode .connected with saidbase and extending across the lower end thereof, fa

second. electrode extending through said insulator and having its endtoward smid' first named electrode threaded, and a sparking memberthreaded upon said second named electrode vand adjustable thereonwhereby the distance between said sparking member and said first 'namedelectrode may be varied, thelower end of said sparking member beingclosed and convex.

2. A spark plug comprising a base, an insulator extending through saidbase, an electrode connected with the lower end of said base vand havinga portion lextending transversely with'respect to the axis of the plug,a second. electrode extending through said'insulaton a sparkling memberhaving an internally;threaded bore engaging upon the end of said secondnamed electrode, andspring disposed within said bore and bearing eagainst the end wall thereof and against the end -of said second namedelecltrede, said sparkingv member being adjust- "able longitudinally ofsaid second named electrode whereb to varythe length ofthe .gap betweensai sparking member and the4 transverse portion of said first namedelec- In testimony whereof I ax my si nature.

ALFRED H. HoAD EY.

